66239233631 has 8 divisors (see below), whose sum is σ = 66362091264. Its totient is φ = 66116419200.

The previous prime is 66239233591. The next prime is 66239233637. The reversal of 66239233631 is 13633293266.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66239233631 is a prime.

It is a super-2 number, since 2×66239233631² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66239233637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6192770 + ... + 6203456.

It is an arithmetic number, because the mean of its divisors is an integer number (8295261408).

Almost surely, 2^66239233631 is an apocalyptic number.

66239233631 is a deficient number, since it is larger than the sum of its proper divisors (122857633).

66239233631 is a wasteful number, since it uses less digits than its factorization.

66239233631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21601.

The product of its digits is 629856, while the sum is 44.

The spelling of 66239233631 in words is "sixty-six billion, two hundred thirty-nine million, two hundred thirty-three thousand, six hundred thirty-one".